Sink



FIG. 1 is front elevation view showing my new design.

FIG. 2 is a rear elevation view of the sink of FIG. 1.

FIG. 3 is a left side elevation view of the sink of FIG. 1, the rightside elevation view being a mirror-image.

FIG. 4 is a top plan view of the sink of FIG. 1; and,

FIG. 5 is a bottom plan view of the sink of FIG. 1.

The portions of the drawings appearing in broken lines are forenvironment only and do not form a part of the claimed design.

The ornamental design for a sink, as shown and described.